Revert "scsi: libsas: delete sas port out of the disco mutex"

hulk inclusion
category: bugfix
bugzilla: 14264
CVE: NA

---------------------------

This reverts commit d8fa4fd57afce5dfae2a8fc5f53002ff261578c3.

This patch is to fix an issue in linux kernel 5.0. Hulk 4.19 does
not need this patch. This will cause kernel panic when cascade expanders
hotplugging.
Signed-off-by: NJason Yan <yanaijie@huawei.com>
Reviewed-by: Nzhengbin <zhengbin13@huawei.com>
Signed-off-by: NYang Yingliang <yangyingliang@huawei.com>

drivers/scsi/libsas/sas_expander.c

@@ -886,7 +886,7 @@ static struct domain_device *sas_ex_discover_end_dev(
 	list_del(&child->dev_list_node);
 	spin_unlock_irq(&parent->port->dev_list_lock);
  out_free:
-	list_add_tail(&phy->port->del_list, &parent->port->sas_port_del_list);
+	sas_port_delete(phy->port);
  out_err:
 	phy->port = NULL;
 	sas_put_device(child);